Valve mechanism for internal-combustion engines.



n J. BURGH. l VALVE MEGHANISM FOR NTBRNAL GOMBSTION ENGNBS.

APPLICATION FILED JAN.24. 1912,

Patented Aug. w, X933.

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W n M f w www w www contact oit its inner surface with a stationary of the valve stem, and forming a stop for the spring. jy virtue ot this construction, y 'the spring norinallj-,f acts to draw the valvef piece outwardly, and consequently inamtains its spherical surface in contact with the cavity or chamber of the head, in which the valve piece is located.

The gear 19 is pro aided with au extension sleeve-29,. which surrounds the spiral spring 2?, and is journaled in an inner cap 30, which secured to the head S by screws 3l, or 'other suit able fastening; devices. This inner cap is open on one side, as shown at 32, to expose the 19 suliciently to mesh with the gear 2O on the spindle 21, as heret. tere explained.

Thehead 2 of the cylinder is provided with a passage con'imnnieaeing with the chamber lll oft the cylinder; this passage 33 has l terally extending portion 3d in which the threaded portion 5 of thespark plug is inserted,

t'he center of the valve piece is provided with a recessor cavity, 37, formingr a part of the l2, and through which the explosive mixture is .introduced to, and the products of combustion escape from the cylinder chamber. This cavity is open at the bottom et' the valve piece, and in it is fitted an expansion ring 38, which is divided, as shown the said ring,` being under sutil nt tension maintain its position in the valve rotate therewith. Below t iis ring, and below the bottom, or inner sur" :tace of the valve piece, is located a protecting dish 31.0, provided at its outer edge with a narrow tlangge 4J., which engages a shoulder i-2, `torn'ied on the cylinder head and surrounded hy a collar t3 integral with such head. By virtue of this :tianege and the eze pansion ring, 'which protrude-.s slightly inwardly below 'the inner surface of the valve piece, the dish l is separated 'troni the valve 'i 'ow space wh r'by the ro c tot the valve is not accomoyany friction resulting` from the part, the only friction being that incidentto the engagement ot' the narrow inner edge of the sp 'ng ring 3S, which is in Contact with the adjacent surface ot the dist: 40. This provided w a central opening t, Termina; communication between the cylin der ehan'iber and the cavity 37 of the valve piece for both induction and exhaust pun poses.

For the purpose oit supplying' the cylinder with explosive mixture, an induction conduit 4.6 is threaded into the inlet port lat of the vcylinder head, while the products of coinlaistion escape thi-ou h the port or pas-- l5 ci the hea d, the axis ont the 'two ports .he-ing; 90 u i. idered with refet the rotary T ,ovasaa From the foregoing descriptio the use and operation of my improved val 7e mechanism will be readily understood.

Assumingr that the crank shaftnot shown, of the engine is in operation, rotary movement will be imparted to the valve piece 1() through the medium of the shaft 25, the gears 24. and .23, the spindle 2O and the spiral ,sears lo and 19. As this valve is rotated, the explosive mixture is introduced to the cylinder chamber through the conduit 4G, the part 14, the passage 12, its central cavi-ty 37, the opening' in the bottom of the valve piece, and the perforation in the disk 40, after which, as the valve continues its rotary movement, the products of combustion are exhausted through the cavity'37 and the passage 12, as will be` readily understood. I

Attention is called to theact that the eX-I pansion sleeve 38, is held against the disk 40', to prevent the entranceA of fluid pressure from the cylinder to the space 44, forming a tight joint. Y

It should be further stated, that vthe gearingconnection between the shaft 25 and the spindle 21, should be such that the said spindle makes one revolution for every two revolutions of the shaft 25, it being assumed that the shaft 25 makes the same number ot revolutions as the crank shaft of the engine, which it is assumed is of the four cycle type.

The valve mechanism outside ol the body ot' the cylinder head may operate in an oil bath. For instance, a cap 22 of the construction shown in Figs. l and 2 may be filled with lubricatingr material, and this 1naterial will work down around the stem 1G ot' the valve piece, and thence to the cavity in which the body ofthe valve piece operates, thus lubricating the entire valve mechanism.

Having' thus described my invention, what l l claim, is:

1. The combination. with a cylinder having a. head equipped with a cavity havingV the shape of a segment of a sphere, the cylinder head. Ibeing' provided with induction and exhaust ports, ot a valve of counter-part, shape, located in said cavity, and having a passage constantly in communication 'with the cylinder chamber, means for rotating the valve, whereby its passage is alternately in communicationwith the induction and eX.- haust ports of the cylinder head, a disk applied to the cylinder head interiorly, and havinga perforation in colnmunicationwith the cavity of the valve, an expansion ring; inserted in the inner extremity of the passage in the valve, and in 'Contact with the said disk and surrounding its perforation, the outer edge of the said ring being exposed to the pressure Within the cylinder, the disk beine, separated from the inner face of the valve, substantially as described.

imma@ 2. The combination with ay cylinder haw ing a head equipped with a cavity,

fitting closely in thlrei'n, said head hav fr @ortis Opening int ratlngf said of a valve sind cavlty and rot'ntable lng: uxlet and exhaust 0 said cavity, a disk sepucavty from the cy1inder, an

Opening in said disk, a passage 1n said vnve said disk except 'fof small Cyh'nh tion sulounchng" the (maling: and means im? rotating In testimony 'whereof 1n presence of two 'Witnefssg Yfitnsses 1 F. E. Bow

said mlm. 

